Tinsmith&#39;s furnace



Mar. 20, 1923.

T. E. ROOKE.

TINSMITHS FURNACE.

FlLED SEPT. 13, 1920.

I no @ntor 6. flm

Patented Mar, Zltl, 1%23.

unite rare TOM E. BOOKE, 0T? CEDAR RAPIDS, IOWA, ASSIGNOB TO THE JOHNSON GAS APPLIANCE COMPANY, OF GEIDAR RAPIDS, IOVJA.

TINSMITHS FURNACE.

Application filed September 13, 1920.

To all whom it may concern Be it known that I, Toni E. ltooxn, a citizen '01 the United States, and resident of Cedar Rapids, in the county of Linn and State of Iowa, have invented a certain new and useful Tinsiniths Furnace, of which the following is a specification. I

This invention relates to that class of furnaces designed to heat tinners coppers and other articles, by heat from a Bunsen gas burner.

The object of my invention is to provide means of simple, durable and inexpensive construction, whereby the supply or to the li'urnace is automatically turned on by the act of placing a soldering copper in position on the furnace, and automatically cut oil' upon the removal of same, whereby a great economy in the use of gas is effected and the convenience of the operator is promoted.

My invention consists in the construction, arrangement and combination of the various parts of the device, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claims, and illustrated in the accompanying drawings, in which:

Figure 1 shows a side elevation of a furnace embodying my invention. The dotted lines to the right of said figure show the gas controlling mechanism in position for shuttingoff the gas when the soldering COP. per has been removed.

Figure 2 shows a detail, vertical, central, sectional view, taken on the line 22 of Figure 3, illustrating the automatic gas controlling device; and

Figure 3 is a detail end view, illustrating the automatic gas controlling device.

Referring to the accompanying drawings, I have used the reference numeral 10 to in dicate the base of the furnace, and 11 a hinged cover. The base and the hinged cover are designed to receive between them a soldering copper 12. A. gas supply pipe 13 is suitably supported in the base, and is designed to supply gas to the cylindrical body portion 14 of the mixer of the Bunsen burner. The gas passage enters this cylindrical chamber at about its central portion, as clearly shown in Figure 2, and at the other end of the cylindrical portion is a gas discharge nipple 15, which enters the mixing Serial No, 410,032.

chamber 16, and the mixing chamber discharges into the furnace. frllidingly mounted in the cylindrical chamber let is a controlling plug 17, arranged for free longitudinal movement, and when in the position shown in Figure 2 it cuts off the supply of gas from the pipe 18, but when withdrawn, as shown by solid lines in Figure 1, it permits gas to pass from the pipe 8 into the nipple 15.

For automatically controlling the movement of the gas controlling plug 17, I have provided a lever 18 hinged to the base between the lugs 19 and provided at its lower end with a slot 20 through which a set screw 21. passed, and said set screw is seated in the gas controlling plug 17.

By this arrangement it is obvious that the amount of gas admitted to the furnace when the burner is open may be readily, easily and quickly adjusted by manipulation of said. set screw 21. If. for instance, the gas pressure is unusually high the set screw is moved to position so that when a copper is placed on the rest 28 the plug 17 will only partially uncover the gas supply pipe and when the pressure of gas is relatively low the set screw 21 may be screwed into the plug further so that when the plug is in its open position it will entirely uncover the gas sup- P y n n An extensible coil spring 22 is interposed between the upper end of the lever 18 and the base 10, to normally hold the gas cohtrolling plug 17 in its closed position, as shown in Figure 2. The upper end of the lever 18 inclines forwardly across the top of the base and is provided with a soldering copper rest 23 at its upper end.

I have also provided a pilot light device 2d of ordinary construction, associated with the gas burner.

In practical use, the soldering copper rest 28 is normally held in the position shown in Figure 2 by the said spring 22, and the supply of to the burner is cut ofi. If it isdesired to start the burner, the operator places the soldering copper 12 in position within the turnace, as shown in Figure 1. This holds the gas controlling plug in open position, and permits the burner to be ignited. So long as the soldering copper is in this position, the furnace will be heated, but at any time the soldering copper is removed, the supply of gas is automatically shut off, thus avoiding the waste of gas that is ordinaril .l occasioned by operators removing the soldering copper and then failing to HWQBWHXPU ff h gash pilot i t provides for automatically lighting the gas any time that it is turned on.

One of the advantages of my invention is that the gas controlling device is so shaped and constructed as tobe readily and easily movable. Hence it will always be moved to open position when the weight of the handle of the soldering copper is placed on thereceiver 23, and; it will always be closed by, the small spring 22 when the soldering copper is, removed.

I claim as my invention:

In a tinsrniths furnace, the combination of, a furnace body, a burner directed upwardly and inwardly into the body, said burner having at its outer end a smooth round opening, a gas supply, pipe leading into the burner at one side of said round opening, a cut-off plug in said round opening capable in one position of closing the gas supply pipe and in another position of Wholly or partially uncovering said gas supply pipe at its entrance into the burner, a screw adj ustably mounted in the outer end of the plug, a lever fulcruined to the frame and formed with a slot at one end designed to receive the screw and with a rest at the other end. to receive a soldering copper, and a spring interposed between the lever and the body to normallyhold the plug in its closed position.

Des Moines, Iowa, August 31., 1920.

TOME. ROOKE. 

